The possibility of the construction of five-membered heterocycles, including single heteroatom or systems with two, three and four heteroatoms were critically reviewed based on the recent reports regarding to the [3+2] cycloaddition reactions. Almost all of analysed reaction are realized with high regio- and stereoselectivity.
In this work, new nitrones, derived from nicotinaldehyde and N-aryl-N-hydroxylamines are described, and methods for their synthesis, and purification are presented. Spectral characterisation of said nitrones is also presented.
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